Charging pile

Abstract

The invention belongs to the field of charging piles especially suitable for electric vehicles, and particularly relates to a charging pile. The invention discloses a charging pile in order to save energy and improve the heat dissipation performance of the charging pile. The charging pile comprises an upper water storage container and a lower water storage container, a water supplementing pipeline and a cooling pipeline used for cooling the internal space of the charging pile are arranged between the upper water storage container and the lower water storage container, and rainwater in the upper water storage container flows into the lower water storage container through the cooling pipeline under the action of gravity; the water supplementing pipeline is provided with a water pump used for conveying rainwater from the lower water storage container to the upper water storage container, and the work done by the water supplementing pipeline to hinder the rainwater in the water supplementing pipeline is smaller than the work done by the cooling pipeline to hinder the rainwater in the water supplementing pipeline. Rainwater is directly lifted from a lower position to a higher position by using the water pump, and the rainwater at the higher position returns to the lower position through the cooling pipeline under the action of self weight, so that the power and the heat productivity of the water pump are reduced, energy is saved, and the heat dissipation performance of the charging pile is improved.

Description

Technical Field

[0001] The present invention belongs to the field of charging piles particularly suitable for electric vehicles, and in particular relates to a charging pile. Background Art

[0002] As the number of electric vehicles increases, how to charge them becomes a problem that needs to be solved urgently. At present, the industry mainly adopts the following two measures to solve this problem: measure 1, increase the number of charging piles; measure 2, increase the charging speed of charging piles, so that one charging pile can charge more vehicles in the same time.

[0003] In order to ensure charging safety, when the temperature of the charging pile is greater than 50°C, the charging power of the charging pile will be rapidly reduced to avoid overheating of the charging pile and safety accidents. On this basis, in order to increase the average charging power of the charging pile, the field often uses separate air cooling, separate liquid cooling, or liquid cooling + air cooling to dissipate heat from the charging pile, so that the charging pile can maintain a larger charging power as much as possible, increase the average charging power of the charging pile, and shorten the charging time for the charging pile to fully charge a single vehicle.

[0004] In charging piles that use liquid cooling for heat dissipation, the coolant needs to be replaced manually regularly, wasting a lot of manpower and material resources. In order to overcome the above problems, the latest charging piles currently use rainwater as coolant, which can automatically replenish coolant on rainy days, thereby saving manpower and material resources. Among them, when using unfiltered rainwater as coolant, the staff needs to regularly clean the water tank and cooling flow channel of the charging pile; when using rainwater filtered by a filter structure as coolant, the staff needs to regularly clean the filter structure.

[0005] For example, the Chinese invention patent application with application publication number CN118722292A and application publication date 2024.10.01 discloses a new energy vehicle charging pile with a heat dissipation system. On rainy days, the charging pile naturally replenishes liquid and uses a liquid discharge motor to discharge excess coolant; on non-rainy days, the liquid replenishment motor is used for replenishment, and when necessary, the liquid discharge motor is used to discharge excess coolant. At the same time, the charging pile also has a liquid pumping motor, which is used to circulate the coolant in the cooling pipe.

[0006] However, the above-mentioned charging pile has three motors, namely, a pumping motor, a draining motor and a replenishing motor, and the structure is relatively complicated. In order to simplify the structure, the invention patent application with application publication number CN117584783A and application publication date 2024.02.23 discloses a charging pile and method for charging electric vehicles with integrated light storage and charging. The charging pile includes a filtering component for filtering rainwater and a water tank (equivalent to a water storage container) for accommodating filtered rainwater. The bottom of the water tank has a water outlet pipe, and a water pump is connected between the water outlet pipe and a coil (equivalent to a cooling pipe) for cooling the internal space of the charging pile. The upper end of the coil is connected to the top of the water tank through a water inlet pipe. The water tank is also equipped with an overflow component (i.e., an overflow structure) to allow excess rainwater to flow out of the overflow component.

[0007] When the internal space of the charging pile is liquid-cooled, the water pump starts, the water in the water tank enters the coil and takes away a large amount of heat, and then the water in the coil returns to the water tank through the water inlet pipe.

[0008] However, in the above charging pile, assuming that the velocity of the water at the outlet is 0, the work done by the water pump on the water is divided into two parts, namely, the work done by the water pump on the water W = W1 + W2, where: W1 = mgh, m is the mass of the water, h is the height difference between the water inlet and the outlet, g is the gravity constant, and W2 is the work done by the water to overcome the resistance to flow in the coil (its magnitude is equal to the work done by the coil to block the rainwater in itself). When the velocity of the water at the outlet is not 0, the work W done by the water pump on the water also includes the kinetic energy E of the water at the outlet k In the above charging pile, the work W done by the water pump on the water is large, resulting in large power and heat generation of the water pump, wasting energy and affecting the heat dissipation performance of the charging pile. Summary of the invention

[0009] The object of the present invention is to provide a charging pile to solve the technical problem that when a water pump is used to drive the coolant to rise along a coil, the power and heat generation of the water pump are large, energy is wasted and the heat dissipation performance is affected.

[0010] To achieve the above purpose, the technical solution of the charging pile provided by the present invention is:

[0011] A charging pile comprises an upper water storage container located at the top and used for collecting rainwater, and a lower water storage container located at the bottom, a water supply pipe and a cooling pipe for cooling the internal space of the charging pile are arranged between the upper water storage container and the lower water storage container, the water inlet and the water outlet of the cooling pipe are respectively connected with the upper and lower water storage containers, so that the rainwater in the upper water storage container flows into the lower water storage container through the cooling pipe under the action of gravity; the water inlet of the water supply pipe is connected with the lower water storage container, and the water outlet is connected with the upper water storage container, and the water supply pipe is provided with a water pump for conveying rainwater from the lower water storage container to the upper water storage container, and the work done by the water supply pipe in obstructing the rainwater in itself is less than the work done by the cooling pipe in obstructing the rainwater in itself.

[0012] Furthermore, a control valve is arranged at the water inlet or outlet of the cooling pipe, and a controller and a temperature sensor for detecting the temperature T of the charging cabinet are arranged on the charging cabinet. When T is not less than the set temperature T0, the controller is used to control the control valve to be in an open state, and when T is less than the set temperature T0, the controller is used to control the control valve to be in a closed state, wherein 40°C <T0≤50℃。

[0013] Furthermore, a low cooling performance water level sensor is provided at the upper part of the lower water storage container, and a high cooling performance water level sensor is provided at the lower part; the water level of the lower water storage container is set as h 下 , the water level corresponding to the high cooling performance water level sensor is h 高 , the water level corresponding to the low cooling performance water level sensor is h 低 ,h 低 >h 高 ; When T is not less than the set temperature T1, when h 下 ≥h 高 When h 下 <h 高 When h 下 ≥h 低 The controller is used to control the operation of the water pump. 下 <h 低 When the controller stops the water pump, T0≤50℃ <T1<70℃。

[0014] Furthermore, a water-saving water level sensor is provided on the upper part of the upper water storage container. Assuming the water level of the upper water storage container is h 上 , the water level corresponding to the water-saving water level sensor is h3; when T≥T1, when h 上 ≥h3, the controller is used to control the water pump to stop working. 上 <h3 and h 下 ≥h 高 When the water pump is turned on, the controller is used to control the operation of the water pump.

[0015] Furthermore, the top of the lower water storage container is open, or the lower water storage container includes a container body with an open top and an upper cover for opening or closing the open top, and the upper cover is provided with a vent hole; the low cooling performance water level sensor constitutes an anti-overflow water level sensor for preventing rainwater from overflowing, and the water level corresponding to the anti-overflow water level sensor is set as h 10 ,h 10 =h 低 ; When h 下 >h 10 When the temperature T and the water level of the upper water storage container are no longer judged, the controller is used to directly control the operation of the water pump.

[0016] Furthermore, an anti-draining water level sensor for limiting the lowest water level is provided in the lower water storage container, and the anti-draining water level sensor constitutes the high cooling performance water level sensor.

[0017] Furthermore, the top of the upper water storage container is also provided with a filtering structure for filtering rainwater and an overflow structure for allowing excess filtered rainwater to overflow. The water inlet of the overflow structure is located below the filtering structure. When the charging pile has a water-saving water level sensor, the water inlet of the overflow structure is located above the water-saving water level sensor.

[0018] Furthermore, the upper water storage container includes a container body with an opening at the upper end and an upper cover, the upper cover is provided with a plurality of perforations, and a filter element is provided at the perforations, and the filter element constitutes the filtering structure; the overflow structure is a drain pipe, the water inlet of the drain pipe is located below the filtering structure, and the drain outlet of the drain pipe is located at the bottom of the charging pile, and when the charging pile has a water-saving water level sensor, the water inlet of the drain pipe is located above the water-saving water level sensor.

[0019] Furthermore, the charging pile also includes an air cooling mechanism, which includes a heat dissipation fan, an air inlet connected to the outside, and an air outlet connected to the outside.

[0020] Furthermore, the cooling pipe includes at least two layers of serpentine pipes, which refer to pipes that meander multiple times in a plane, and heat sinks are installed on the surface of the serpentine pipes; the water supply pipe includes a vertical pipe that directly connects the upper water storage container and the lower water storage container.

[0021] The beneficial effects of the charging pile of the present invention are as follows: the present invention is a pioneering invention. When cooling the charging pile, rainwater in the upper water storage container flows into the lower water storage container through the cooling pipe under the action of gravity, so that the rainwater can take away the heat collected by the cooling pipe; in order to replenish rainwater into the upper water storage container and ensure that there is a continuous flow of rainwater in the upper water storage container into the cooling pipe, in the present invention, a water pump is used to pump the water in the lower water storage container into the upper water storage container through the water replenishment pipe.

[0022] Compared with the technical solution in the prior art that uses a water pump to pump rainwater to the top of the water tank through a coil (i.e., a cooling pipe), in the present invention, the function of the water pump is to pump rainwater to the upper water storage container through a water supply pipe, and the work done by the water supply pipe in blocking the rainwater in itself is less than the work done by the cooling pipe in blocking the rainwater in itself. Therefore, the water pump has a smaller power and generates less heat, which can save energy and reduce the heat generation of the charging pile to improve the heat dissipation performance of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the control logic diagram of the charging pile of the present invention when T0=45°C and T1=60°C;

[0024] Figure 2 It is a structural schematic diagram of the liquid cooling mechanism of the charging pile of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the charging pile of the present invention;

[0026] Figure 4 A top view of the charging pile of the present invention;

[0027] Figure 5 for Figure 4 AA view;

[0028] Description of reference numerals:

[0029] 1. First upper cover; 2. Filter element; 3. Water-saving water level sensor; 4. Control valve; 5. Upper container body; 6. Cooling pipe; 7. Drain pipe; 8. Water supply pipe; 9. Lower container body; 10. Anti-overflow water level sensor; 11. Drain port; 12. Water pump; 13. Anti-drainage water level sensor; 14. Second upper cover; 15. Heat sink; 16. Cooling fan; 17. Exhaust port; 18. Temperature sensor. DETAILED DESCRIPTION

[0030] To solve the problems in the background technology, the core inventive concept of the present invention is: using a water pump to directly lift rainwater from a lower position to a higher position, and allowing the rainwater at a higher position to return to a lower position through a cooling pipe under the action of its own weight, thereby reducing the work done by the water pump on the rainwater.

[0031] The present invention is further described in detail below in conjunction with embodiments.

[0032] The specific embodiment of the charging pile provided by the present invention is:

[0033] like Figures 1 to 5As shown, as a basic specific implementation, it includes an upper water storage container located at the top and used to collect rainwater and a lower water storage container located at the bottom. A water supply pipe 8 and a cooling pipe 6 for cooling the internal space of the charging pile are arranged between the upper water storage container and the lower water storage container. The water inlet and outlet of the cooling pipe 6 are respectively connected with the upper and lower water storage containers, so that the rainwater in the upper water storage container flows into the lower water storage container through the cooling pipe 6 under the action of gravity; the water inlet of the water supply pipe 8 is connected with the lower water storage container, and the water outlet is connected with the upper water storage container, and the water supply pipe 8 is equipped with a water pump 12 for transporting rainwater from the lower water storage container to the upper water storage container, and the work done by the water supply pipe 8 to hinder the rainwater in itself is less than the work done by the cooling pipe 6 to hinder the rainwater in itself. Among them, the upper water storage container, the lower water storage container, the cooling pipe 6, the water supply pipe 8 and the water pump 12 constitute the liquid cooling mechanism of the charging pile; the upper water storage container and the lower water storage container can be water storage containers such as water tanks and water tanks.

[0034] When cooling the charging pile, rainwater in the upper water storage container flows into the lower water storage container through the cooling pipe 6 under the action of gravity, so that the rainwater can take away the heat collected by the cooling pipe 6; in order to replenish rainwater into the upper water storage container and ensure that there is a steady stream of rainwater in the upper water storage container entering the cooling pipe 6, in the present invention, a water pump 12 is used to pump the water in the lower water storage container into the upper water storage container through the water replenishment pipe 8.

[0035] Compared with the technical solution in the prior art that uses a water pump 12 to pump rainwater to the top of the water tank through a coil (i.e., the cooling pipe 6), in the present invention, the function of the water pump 12 is to pump rainwater to the upper water storage container through the water supply pipe 8, and the work done by the water supply pipe 8 to block the rainwater in itself is less than the work done by the cooling pipe 6 to block the rainwater in itself. Therefore, the water pump 12 has a smaller power and generates less heat, which can save energy and reduce the heat generation of the charging pile to improve the heat dissipation performance of the charging pile.

[0036] In order to improve the heat dissipation capacity of the charging pile, the specific improvements of the cooling pipe 6 and the water supply pipe 8 are as follows:

[0037] like Figure 2 As shown, as an improved first embodiment, the cooling pipe 6 includes at least two layers of serpentine pipes, which refer to pipes that meander multiple times in a plane, thereby ensuring that the cooling pipe 6 has a larger contact area with the internal space of the charging pile, thereby improving the heat dissipation effect of the charging pile. The water supply pipe 8 includes a vertical pipe that directly connects the upper water storage container and the lower water storage container, thereby minimizing the work done by the water pump 12 on the rainwater and reducing the power of the water pump 12.

[0038] Preferably, a heat sink 15 is installed on the surface of the cooling pipe 6 (mainly a coil or a serpentine tube) to further improve the heat dissipation effect of the charging pile.

[0039] In a relatively inferior second type of specific implementation, the cooling pipe 6 can be a coiled pipe, and the water replenishing pipe 8 includes an inclined pipe directly connecting the upper water storage container and the lower water storage container. At this time, compared with the prior art, the power of the water pump 12 is also relatively small.

[0040] In this embodiment, the specific shapes of the cooling pipe 6 and the water replenishing pipe 8 are not limited, as long as the work obstructed by the rainwater in the water replenishing pipe 8 itself is less than the work obstructed by the rainwater in the cooling pipe 6 itself.

[0041] To improve the utilization efficiency of rainwater (i.e., coolant) and save energy, the specific improvements to the liquid cooling mechanism are as follows:

[0042] As Figures 1 to 5 shown, as a third type of improved specific implementation, a control valve 4 is arranged at the water inlet or outlet of the cooling pipe 6. A controller and a temperature sensor 18 for detecting the temperature T of the charging cabinet are arranged on the charging cabinet. When T is not less than the set temperature T0, the controller is used to control the control valve 4 to be in an open state. When T is less than the set temperature T0, the controller is used to control the control valve 4 to be in a closed state, where 40°C < T0 ≤ 50°C. T0 can specifically be values such as 40.1°C, 45°C, 49.9°C, or 50°C, etc. In some relatively inferior specific implementations, it can also be values less than 50°C such as 30°C, 35°C, etc.

[0043] In the present invention, the specific requirements for T0 are as follows: In the art, after the temperature of the charging pile reaches 50°C, the charging power of the charging pile will drop rapidly. Therefore, when the temperature of the charging pile reaches 50°C, the liquid cooling system needs to be in a working state, that is, T0 ≤ 50°C; according to the weather conditions of the city where the charging pile is located, determine the temperature of the charging pile when it is not charging a vehicle. This temperature can be values such as 30°C, 40°C, etc. (specifically determined according to the actual situation), and make T0 greater than the temperature of the charging pile when it is not charging a vehicle, so as to ensure that the liquid cooling system does not work and save energy when the charging pile is not charging a vehicle.

[0044] That is, in the third type of specific implementation, when the temperature T is less than the set temperature T0, the liquid cooling mechanism does not work, saving energy; when the temperature T is greater than the set temperature T0, the temperature of the cooling pipe 6 inside the charging cabinet is relatively high, and the temperature difference between the rainwater in the cooling pipe 6 and the cooling pipe 6 is relatively large, thereby improving the utilization efficiency of rainwater (i.e., coolant) and saving energy.

[0045] In a relatively inferior fourth type of specific implementation, the charging pile does not include the control valve 4. At this time, the liquid cooling mechanism is always in a working state. Even when the charging pile is in an idle state (i.e., the charging pile is not charging a vehicle), the liquid cooling mechanism is also in a working state, but it can still save some energy compared with the prior art.

[0046] In the third embodiment, in order to save energy and improve heat dissipation efficiency, the specific improvements to the liquid cooling mechanism are as follows:

[0047] like Figures 1-2 As shown, as an improved specific implementation of category 3-1, a low cooling performance water level sensor is provided at the upper part of the lower water storage container, and a high cooling performance water level sensor is provided at the lower part; the water level of the lower water storage container is set to h 下 , the water level corresponding to the high cooling performance water level sensor is h 高 , the water level corresponding to the low cooling performance water level sensor is h 低 ,h 低 >h 高 ; When T is not less than the set temperature T1, when h 下 ≥h 高 When h 下 <h 高 When h 下 ≥h 低 When h 下 <h 低 When T0≤50℃, the controller is used to control the water pump 12 to stop working; <T1<70℃。

[0048] Wherein, T1 is specifically a value such as 50.1°C, 55°C, 60°C, 65°C or 69.9°C. In the present invention, the specific requirements for T1 are as follows:

[0049] In the art, the maximum reasonable charging temperature of the charging pile is 70°C. When the temperature of the charging pile exceeds 70°C, the charging pile is in an overheated state. After the charging pile is in an overheated state for a certain period of time, the charging pile will trigger an overheating protection mechanism (i.e. stop charging the vehicle). Therefore, in this embodiment, T1<70°C.

[0050] When the charging pile is charging the vehicle, when T<T1, the liquid level difference between the lower water storage container and the upper water storage container is small, and the time for the water in the upper water storage container to flow to the lower water storage container through the cooling pipe 6 is longer, that is, the flow rate of the water in the cooling pipe 6 is slower. In the same time, the volume of water flowing into the lower water storage container is smaller. At this time, the power of the water pump 12 is lower, which can save energy and reduce the heat generated by the water pump 12.

[0051] When T≥T1, the water level of the lower water storage container is h 下At this time, the liquid level difference between the upper water storage container and the lower water storage container is relatively large, and the time for the water in the upper water storage container to flow to the lower water storage container through the cooling pipe 6 is relatively short, that is, the flow rate of the water in the cooling pipe 6 is relatively fast. In the same time, the volume of water flowing through the cooling pipe 6 is relatively large, thereby improving the heat dissipation efficiency of the liquid cooling mechanism.

[0052] Preferably, as one specific embodiment, the lower water storage container is provided with a device for limiting the minimum water level h 13 The anti-draining water level sensor 13, the anti-draining water level sensor 13 constitutes the high cooling performance water level sensor, h 13 =h 高 At this time, the liquid level difference between the upper water storage container and the lower water storage container is the largest, and the heat dissipation efficiency of the liquid cooling mechanism is the highest.

[0053] As a relatively inferior specific implementation method, h 高 >h 13 At this time, although the heat dissipation efficiency of the liquid cooling mechanism is not the highest, it has also been improved.

[0054] As a relatively inferior embodiment of the 3-2 type, only one water level sensor is provided in the lower water storage container. 下 When the water level in the lower water storage container is not lower than the water level corresponding to the water level sensor, the controller is used to control the water pump 12 to work. 下 When the water level is lower than the water level corresponding to the water level sensor, the controller is used to control the water pump 12 to stop working. Although this specific implementation wastes energy and the flow rate of rainwater in the cooling pipe 6 remains unchanged, this method can also meet the normal cooling requirements of the charging pile.

[0055] In the specific implementation manner of category 3-1, in order to increase the maximum volume of rainwater stored in the liquid cooling mechanism, the following improvements are made to the liquid cooling mechanism:

[0056] In the preferred specific implementation of category 3-1-1, a water-saving water level sensor 3 is provided on the upper part of the upper water storage container, and the water level of the upper water storage container is set to h 上 , the water level corresponding to the water-saving water level sensor 3 is h3; when T≥T1, when h 上 ≥h3, the controller is used to control the water pump 12 to stop working. 上 <h3 and h 下 ≥h 高 When the water pump 12 is turned on, the controller is used to control the water pump 12 to work.

[0057] By setting the water-saving water level sensor 3, rainwater can be effectively prevented from overflowing the upper water storage container, ensuring that there is a large amount of water stored in the liquid cooling mechanism. At this time, the maximum water storage capacity in the liquid cooling mechanism = water in the upper water storage container + water in the cooling pipe 6 + water in the lower water storage container, and the water level in the lower water storage container h 下 Compared with the lowest water level 13 high.

[0058] In the rainy season (i.e. the season with more rainfall), the water-saving water level sensor 3 does not play a big role, but in the dry season (i.e. the season with less rainfall), due to the less rainfall, the number of times and amount of rainwater added to the upper water storage container are less. By setting the water-saving water level sensor 3, it is possible to prevent rainwater from overflowing from the upper water storage container when the water pump 12 is working, ensuring that there is more rainwater in the liquid cooling mechanism, so that the charging pile can adapt to the dry season and arid areas.

[0059] In the inferior 3-1-2 specific implementation, the water-saving water level sensor 3 is not provided in the upper water storage container, and the excess rainwater will overflow from the upper water storage container. At this time, the maximum water storage capacity in the liquid cooling mechanism = water in the upper water storage container + water in the cooling pipe 6 + water at the lowest water level in the lower water storage container. The water storage capacity in the liquid cooling mechanism can be increased by increasing the volume of the upper water storage container, so that the charging pile can adapt to the dry season and arid areas.

[0060] In the specific implementation of category 3-1, in order to facilitate the maintenance of the lower water storage container and the water pump 12 and water level sensor therein, and in order to save energy, the specific improvements to the lower water storage container are as follows:

[0061] like Figures 1-2 As shown, in the preferred 3-1-3 specific implementation, the lower water storage container includes a container body with an open top and a second upper cover 14 for opening or closing the open top, and the second upper cover 14 is provided with a vent hole; the low cooling performance water level sensor constitutes an anti-overflow water level sensor 10 for preventing rainwater from overflowing, and the water level corresponding to the anti-overflow water level sensor 10 is h 10 ,h 10 =h 低 ; When h 下 >h 10 When the temperature T and the water level of the upper water storage container are no longer determined, the controller is used to directly control the operation of the water pump 12. When repairing the water pump 12 and the water level sensor in the lower water storage container, only the second upper cover 14 needs to be opened.

[0062] In the preferred embodiment of the 3-1-4 class, the top of the lower water storage container is open, and the low cooling performance water level sensor constitutes an anti-overflow water level sensor 10 for preventing rainwater from overflowing. When repairing the water pump 12 and the water level sensor in the lower water storage container, the repair can be directly performed.

[0063] In the inferior 3-1-5 specific implementation, the second upper cover 14 of the lower water storage container is welded to the container body, and in this case, there is no need to set the anti-overflow water level sensor 10. When repairing the water pump 12 and the water level sensor in the lower water storage container, the lower water storage container must be dismantled.

[0064] In the inferior 3-1-6 specific implementation, the lower water storage container includes a lower container body 9 with an open top and a second upper cover 14 for opening or closing the open top, the second upper cover 14 is sealed with the lower container body 9, and there is no air vent on the second upper cover 14. When repairing the water pump 12 and the water level sensor in the lower water storage container, the sealing cover can be opened.

[0065] In the 3-1-3 and 3-1-4 specific implementation embodiments, the atmospheric pressure directly acts on the water surface of the lower water storage container and the water surface of the upper water storage container. Therefore, the work done by the water pump 12 on the rainwater = the increased gravitational potential energy of the rainwater + the energy consumed by the rainwater being blocked by the water supply pipe 8; and in the 3-1-5 or 3-1-6 specific implementation embodiments, since the lower water storage container is not connected to the outside atmosphere, after the water in the lower water storage container is pumped into the upper water storage container, a vacuum area will be formed above the lower water storage container. At this time, the work done by the water pump 12 on the rainwater = the increased gravitational potential energy of the rainwater + the energy consumed by the rainwater being blocked by the water supply pipe 8 + the work done by the rainwater to overcome the suction of the vacuum area on the rainwater.

[0066] To sum up, relative to the specific implementation embodiments of category 3-1-5 or category 3-1-6, in the preferred specific implementation embodiments of categories 3-1-3 and 3-1-4, on the one hand, the space in the lower water storage container is connected to the outside atmosphere, which is beneficial to reducing the power of the water pump 12; on the other hand, it is convenient to maintain the water pump 12 and the water level sensor in the lower water storage container.

[0067] It should be noted that in the preferred specific implementations of categories 3-1-3 and 3-1-4, at the end of the vehicle's charging process or after the vehicle has completed charging, the temperature of the charging pile will gradually decrease. During this process, the temperature of the charging pile will first decrease to below T1, so that more rainwater is stored in the lower water storage container. After that, the temperature of the charging pile will decrease to below T0. In the case of no rain for many consecutive days and hot weather, compared with the upper water storage container, the lower water storage container is located at the bottom of the charging pile, and the rainwater in the lower water storage container will not be exposed to direct sunlight, so the evaporation rate of the rainwater in the lower water storage container is slower, which is conducive to reducing the evaporation of rainwater (i.e., coolant) and adapting to weather conditions without rain for a long time.

[0068] In order to reduce the frequency of cleaning the upper water storage container, the lower water storage container, the cooling pipe 6 and the water supply pipe 8, the specific improvements to the liquid cooling mechanism are as follows:

[0069] In the preferred fifth embodiment, a filtering structure for filtering rainwater and an overflow structure for overflowing excess filtered rainwater are also provided on the top of the upper water storage container, and the water inlet of the overflow structure is located below the filtering structure. The filtering structure can filter dust in the rainwater, reducing the frequency of cleaning the upper water storage container, the lower water storage container, the cooling pipe 6 and the water supply pipe 8; when the water pump 12 is working, the overflow structure can prevent rainwater from backwashing the filtering structure.

[0070] Among them, in the specific implementation method formed by combining the 5th type of specific implementation method and the 3-1-1 type of specific implementation method, the charging pile has a water-saving water level sensor 3, and the water inlet of the overflow structure is located above the water-saving water level sensor 3.

[0071] In the inferior sixth embodiment, the top of the upper water storage container is open, and rainwater directly enters the upper water storage container without being filtered; when the water pump 12 is working, rainwater can overflow from the open top of the upper water storage container.

[0072] On the basis of the fifth embodiment, in order to simplify the structure, the specific improvements to the filtration structure and the overflow structure are as follows:

[0073] In the specific implementation of category 5-1, the upper water storage container includes an upper container body 5 with an upper opening and a first upper cover 1. The first upper cover 1 is provided with a plurality of perforations, and a filter element 2 is provided at the perforations. The filter element 2 constitutes the filtering structure, which has a simple structure. The overflow structure is a drain pipe 7, and the water inlet of the drain pipe 7 is located below the filtering structure. The drain outlet 11 of the drain pipe 7 is located at the bottom of the charging pile, thereby preventing rainwater from flowing around. Specifically, the filter element 2 is a commonly used filtering structure for filtering water in the prior art, such as a combination of filter cotton, gravel and activated carbon.

[0074] Correspondingly, in a specific implementation scheme formed by combining the specific implementation scheme of category 5-1 and the specific implementation scheme of category 3-1-1, the charging pile has a water-saving water level sensor 3, and the water inlet of the drain pipe 7 is located above the water-saving water level sensor 3.

[0075] In the inferior specific implementation mode of category 5-2, at least one layer of filter screen may be provided below the first upper cover 1, and the filter screen constitutes the filter structure.

[0076] In the inferior 5-3 specific implementation, the overflow structure can also be an overflow hole set on the upper part of the upper water storage container. In this case, after the rainwater flows out of the overflow hole, it will flow down along the surface of the charging cabinet, which will cause the outer surface of the charging pile to be full of rainwater, and the charging experience of the charging personnel is poor. However, it should be noted that the charging pile can withstand the erosion of rainwater, that is, the charging pile has rainproof ability, so even if the rainwater flows down along the surface of the charging cabinet after flowing out of the overflow hole, it will not affect the normal charging of the vehicle by the charging pile.

[0077] In order to further improve the heat dissipation capability, the specific improvements to the charging pile are as follows:

[0078] In a preferred embodiment of the seventh category, the charging pile further includes an air cooling mechanism, which includes a heat dissipation fan 16, an air inlet connected to the outside, and an air outlet 17 connected to the outside, thereby improving the heat dissipation capacity of the charging pile. The specific structure of the air cooling mechanism is not the key point of the present invention, and the air cooling mechanism can be the same as the existing air cooling mechanism, which will not be described in detail here.

[0079] In the inferior 8th category specific implementation, the charging pile does not include an air cooling mechanism, and only relies on a liquid cooling mechanism to dissipate heat from the charging pile. In this case, the charging pile can also be used normally. According to actual conditions, the average charging power of the charging pile is slightly lower than the average charging power of the charging pile in the 7th category specific implementation, but it does not affect the charging of the vehicle.

[0080] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein, or organically combine different types of specific implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A charging pile, characterized in that: It includes an upper water storage container located at the top and used to collect rainwater, and a lower water storage container located at the bottom. A water supply pipe and a cooling pipe for cooling the internal space of the charging pile are arranged between the upper water storage container and the lower water storage container. The water inlet and outlet of the cooling pipe are respectively connected with the upper and lower water storage containers, so that the rainwater in the upper water storage container flows into the lower water storage container through the cooling pipe under the action of gravity; the water inlet of the water supply pipe is connected with the lower water storage container, and the water outlet is connected with the upper water storage container, and the water supply pipe is equipped with a water pump for transporting rainwater from the lower water storage container to the upper water storage container, and the work done by the water supply pipe in obstructing the rainwater in itself is less than the work done by the cooling pipe in obstructing the rainwater in itself.

2. The charging pile according to claim 1, characterized in that: The water inlet or outlet of the cooling pipe is provided with a control valve, and the charging cabinet is provided with a controller and a temperature detection device for detecting the temperature of the charging cabinet. T The temperature sensor, T Not less than the set temperature The controller is used to control the control valve to be in the open state. T Less than the set temperature When the controller is used to control the control valve to be in a closed state, .

3. The charging pile according to claim 2, characterized in that: The upper part of the lower water storage container is provided with a low cooling performance water level sensor, and the lower part is provided with a high cooling performance water level sensor; the water level of the lower water storage container is set to , the water level corresponding to the high cooling performance water level sensor is , the water level corresponding to the low cooling performance water level sensor is , ;exist T Not less than the set temperature When The controller is used to control the water pump to work, and when When the controller is used to control the water pump to stop working; T < When The controller is used to control the water pump to work. When the controller is used to control the water pump to stop working; .

4. The charging pile according to claim 3, characterized in that: A water-saving water level sensor is provided on the upper part of the upper water storage container. , the water level corresponding to the water-saving water level sensor is ;exist T ≥ When The controller is used to control the water pump to stop working. and When the water pump is turned on, the controller is used to control the operation of the water pump.

5. The charging pile according to claim 3 or 4, characterized in that: The top of the lower water storage container is open, or the lower water storage container includes a container body with an open top and an upper cover for opening or closing the open top, and the upper cover is provided with a vent hole; the low cooling performance water level sensor constitutes an anti-overflow water level sensor for preventing rainwater from overflowing, and the water level corresponding to the anti-overflow water level sensor is , ;when When the temperature is no longer determined T The controller is used to directly control the operation of the water pump according to the size of the water tank and the water level of the upper water storage container.

6. The charging pile according to claim 3 or 4, characterized in that: An anti-draining water level sensor for limiting the lowest water level is arranged in the lower water storage container, and the anti-draining water level sensor constitutes the high cooling performance water level sensor.

7. The charging pile according to claim 1 or 2, characterized in that: The top of the upper water storage container is also provided with a filtering structure for filtering rainwater and an overflow structure for allowing excess filtered rainwater to overflow. The water inlet of the overflow structure is located below the filtering structure. When the charging pile has a water-saving water level sensor, the water inlet of the overflow structure is located above the water-saving water level sensor.

8. The charging pile according to claim 7, characterized in that: The upper water storage container includes a container body with an opening at the upper end and an upper cover, the upper cover is provided with a plurality of perforations, and a filter element is provided at the perforations, and the filter element constitutes the filtering structure; the overflow structure is a drain pipe, the water inlet of the drain pipe is located below the filtering structure, and the drain outlet of the drain pipe is located at the bottom of the charging pile. When the charging pile has a water-saving water level sensor, the water inlet of the drain pipe is located above the water-saving water level sensor.

9. The charging pile according to claim 1 or 2, characterized in that: The charging pile also includes an air cooling mechanism, which includes a heat dissipation fan, an air inlet connected to the outside world, and an air exhaust port connected to the outside world.

10. The charging pile according to claim 1 or 2, characterized in that: The cooling pipeline includes at least two layers of serpentine pipes, which refer to pipes that meander multiple times in a plane, and heat sinks are installed on the surface of the serpentine pipes; the water supply pipeline includes a vertical pipe that directly connects the upper water storage container and the lower water storage container.

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